The current situation in Iraq should properly be described as “a multifactional civil war” in which “the government is composed of rival Shia factions” and “they are embattled with an outside Shia group, the Mahdi Army ,” Ira M. Lapidus, a co-author of “Islam, Politics and Social Movements” and a professor of history at the Center for Middle Eastern Studies at the University of California, Berkeley, wrote in an e-mail message.
Source: wiktionary